#include <iostream>
using namespace std;

int max(int a, int b, int c = -0xFFFFFFFF)
{
  if (a < b) a = b;
  if (a < c) a = c;
  return a;
}

int main(){
  int a, b, c;
  a = 1;
  b = 2;
  
  cout << "最大值是：" << (max(a, b)) << endl;
  return 0;
}
